At Wed, 15 Apr 2009 15:46:20 +0200 CentOS mailing list <centos at centos.org> wrote: > > Michael A. Peters a écrit : > > >> > >> 1) Am I supposed to be root to use cdrecord and burn an .iso file? > > > > I've found it works much better if you are root. > > > > I tried both, and see: cdrecord complains about not being able to set > certain priorities while being run as user, which induces a high risk > for buffer underruns. So I have my answer for that. > > Another cdrecord-related question. Usually I should be able to copy a CD > as simply as that: > > $ dd if=/dev/cdrom of=copy.iso > > Then insert a blank CD, and: > > $ cdrecord -v -eject dev=/dev/cdrom copy.iso > > Now I did that for data CDs, and it works very well. I thought, normally > this *should* also work for audio CDs, so I gave that a spin. But > everytime I try it, dd stops short and gives me an "Input/output error" > for /dev/hdc. While dd *can* be used to copy single-track data CDs, it is better to use the readcd program (comes with the cdrecord package). For audio CDs, the cdda2wav program would be a better option. > > I tried three different audio CDs, all three in good state. I can listen > to them OK on the PC. But all I get with dd is a zero-byte-length > copy.iso file. An audio CD is not like a data CD. It does not have a 'file system'. It is a collection of data tracks, containing cdda files. > > Any idea what's happening? > > Niki > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- Robert Heller -- 978-544-6933 Deepwoods Software -- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows heller at deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/